ABB S203M-K40UC: A high-performance, 3P, 40A miniature circuit breaker for DC and AC applications, offering flexible mounting and compliance with major international standards.
Product ModelS203M-K40UC
Material Number2CDS273061R0557
Product ID80397
Stock on Request
Last updated: 8/29/2026
Key Features
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Feature1. High Short-Circuit Breaking Capacity The S203M-K40UC boasts a high short-circuit breaking capacity of 25 kA at 230 V and 10 kA at 400 V, ensuring reliable protection against electrical surges.
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Feature2. Flexible Mounting Options This MCB can be easily mounted on DIN rails using TH35-15 or TH35-7.5 mm mounting rails, providing flexibility in installation.
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Feature3. Compliance with Major Standards The S203M-K40UC meets international standards such as IEC/EN 60947-2, UL 1077, and CSA 22.2 No. 235, ensuring compatibility with a wide range of applications.
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Feature4. Dual Application Capability Designed for both DC and AC applications, this MCB offers a versatile solution for various electrical needs, from residential to industrial settings.
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
Specifications may be subject to change without notice
Parameter
Value
Parameter
Value
Standards
CSA 22.2 No. 235 IEC/EN 60947-2 UL 1077
Tripping Characteristic
K
Rated Operational Voltage
acc. to IEC 60898-1 400 V AC acc. to IEC 60898-1 440 V acc. to IEC 60947-2 440 V AC acc. to IEC 60947-2 440 V DC
Rated Insulation Voltage (Ui)
acc. to IEC/EN 60664-1 440 V
Rated Impulse Withstand Voltage (Uimp)
4 kV at 2000 m 5 kV at Sea Level 6.2 kV
Input Voltage Type
5
Feature5. User-Friendly Indication The device features a clear contact position indication (CPI) and a red ON/green OFF status indicator, enhancing user safety and ease of operation.
AC/DC
Rated Current (In)
40 A
Rated Short-Circuit Capacity
(AC) 10 kA (230 V AC) 10 kA (400 V AC) 10 kA (230 V) 10 kA (400 V) 10 kA
